The Fresh-water Algae of the United StatesMcGraw-Hill, 1950 - 719 pagine This edition follows the general plan of the first edition, except for treatment of the species in the various genera. In the first edition, where there were less than ten species in a genus, each was named and briefly characterized. In this edition the species of a genus are listed and references given to sources where a complete description of each of them can be found. Another change is the addition of a survey of the Charophyceae, Cryptophyceae, and Chloromonadales, groups that were not treated in the first edition. |
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Pagina 441
... diatoms may be readily recognized by the bilateral or radial markings on the wall when a cell is viewed from above . Within a cell are one to many , variously shaped , yellowish to brownish chromatophores , which contain chlorophyll a ...
... diatoms may be readily recognized by the bilateral or radial markings on the wall when a cell is viewed from above . Within a cell are one to many , variously shaped , yellowish to brownish chromatophores , which contain chlorophyll a ...
Pagina 442
... Diatoms from such habitats are more strictly aerial than are those growing on rocky cliffs continually moistened by the spray from waterfalls , or by the seepage of water . Many diatoms are also to be found in strictly terrestrial ...
... Diatoms from such habitats are more strictly aerial than are those growing on rocky cliffs continually moistened by the spray from waterfalls , or by the seepage of water . Many diatoms are also to be found in strictly terrestrial ...
Pagina 460
... diatoms and to those known only in a fossil condition . Schütt places all diatoms in a single family and establishes subfamilies , tribes , subtribes , and other family subdivisions to show the affinities between closely related genera ...
... diatoms and to those known only in a fossil condition . Schütt places all diatoms in a single family and establishes subfamilies , tribes , subtribes , and other family subdivisions to show the affinities between closely related genera ...
Sommario
NATURE EVOLUTION AND CLASSIFICATION OF THE ALGAE | 1 |
THE DISTRIBUTION AND OCCURRENCE OF FRESHWATER ALGAE | 12 |
COLLECTION PRESERVATION AND METHODS OF STUDYING THE FRESHWATER ALGAE | 27 |
Copyright | |
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Parole e frasi comuni
akinetes algae algal apical aplanospores Asexual reproduction Auxospores axial axis basal biflagellate branches cell division cell wall Chlorophyceae chloroplast chromatophores colony conjugation contains contractile vacuoles cup-shaped cylindrical cytoplasm daughter cells develop diatoms differ as follows discoid ellipsoidal elongate epiphytic eyespot filaments flagella flagellated flagellum flora formation four free-floating fresh-water frustules G. M. Smith G. S. West gametes Geitler gelatinous gelatinous envelope gelatinous material gelatinous sheath genus germination girdle view globose growing heterocysts Ibid intercalary bands irregularly isogamous Klebs Korshikov Kütz laminate layer liberated longitudinal lorica motile Myxophyceae Näg nodule nucleus Oedogonium ornamentation parent-cell wall parietal Pascher plankton plast poles portion posterior Protistenk protoplast pyrenoid quadriflagellate raphe rhizoidal semicells sessile setae Sexual reproduction shape solitary species found spherical spines Spirogyra spores starch statospores structure thallus transverse trichomes Ueber unicellular uninucleate usually valve view vegetative cells Volvocales zoospores zygote